Ink Supply Mechanism - Ricoh C231 Service Manual

6.8.3 INK SUPPLY MECHANISM

Ink is supplied from the ink cartridge to the ink roller [B] by a trochoid type pump [C].
The ink pump is driven by the ink supply motor (a dc motor) [D].
Ink drops through the holes in the drum shaft [A] onto the ink roller [B].
There is an ink filter [E] at the entrance of the ink nozzle. The ink filter prevents
small objects from getting into the ink pump and causing damage.
NOTE: 1) There are 4 holes in the shaft for the B4 size drum models, and two
holes for the Legal and A4 drum versions.
2) Optional drum units do not use the trochoid type pump, but use a piston
pump.
SM
[E]
[A]
[B]
6-25
[C]
[D]
C267D013.WMF
DRUM
C267